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Title: Pairfield fluctuations of a 2D Hubbard model

Abstract

At temperatures above the superconducting transition temperature, the pairfield susceptibility provides information on the nature of the pairfield fluctuations. Here, we study the d-wave pairfield susceptibility of a 2D Hubbard model for a doping which has a pseudogap (PG) and for a doping which does not. In both cases, there will be a region of Kosterlitz–Thouless fluctuations as the transition at T KT is approached. Above this region, we find evidence for pairfield-order parameter-phase fluctuations for dopings with a PG and BCS Cooper pair fluctuations for dopings without a PG.

Authors:
ORCiD logo [1];  [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of California, Santa Barbara, CA (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1542233
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
npj Quantum Materials
Additional Journal Information:
Journal Volume: 4; Journal Issue: 1; Journal ID: ISSN 2397-4648
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Maier, Thomas A., and Scalapino, Douglas J. Pairfield fluctuations of a 2D Hubbard model. United States: N. p., 2019. Web. doi:10.1038/s41535-019-0169-9.
Maier, Thomas A., & Scalapino, Douglas J. Pairfield fluctuations of a 2D Hubbard model. United States. doi:10.1038/s41535-019-0169-9.
Maier, Thomas A., and Scalapino, Douglas J. Thu . "Pairfield fluctuations of a 2D Hubbard model". United States. doi:10.1038/s41535-019-0169-9. https://www.osti.gov/servlets/purl/1542233.
@article{osti_1542233,
title = {Pairfield fluctuations of a 2D Hubbard model},
author = {Maier, Thomas A. and Scalapino, Douglas J.},
abstractNote = {At temperatures above the superconducting transition temperature, the pairfield susceptibility provides information on the nature of the pairfield fluctuations. Here, we study the d-wave pairfield susceptibility of a 2D Hubbard model for a doping which has a pseudogap (PG) and for a doping which does not. In both cases, there will be a region of Kosterlitz–Thouless fluctuations as the transition at TKT is approached. Above this region, we find evidence for pairfield-order parameter-phase fluctuations for dopings with a PG and BCS Cooper pair fluctuations for dopings without a PG.},
doi = {10.1038/s41535-019-0169-9},
journal = {npj Quantum Materials},
number = 1,
volume = 4,
place = {United States},
year = {2019},
month = {6}
}

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Works referenced in this record:

Ordering, metastability and phase transitions in two-dimensional systems
journal, April 1973

  • Kosterlitz, J M; Thouless, D J
  • Journal of Physics C: Solid State Physics, Vol. 6, Issue 7, p. 1181-1203
  • DOI: 10.1088/0022-3719/6/7/010

The influence of fluctuation pairing of electrons on the conductivity of normal metal
journal, February 1968